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CVE-2022-49015: net: hsr: Fix potential use-after-free

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: net: hsr: Fix potential use-after-free The skb is delivered to netif_rx() which may free it, after calling this, dereferencing skb may trigger use-after-free.

Affected products

• Linux kernel: from 3.13 before 4.9.335; from 4.10 before 4.14.301; from 4.15 before 4.19.268; from 4.20 before 5.4.226; from 5.5 before 5.10.158; from 5.11 before 5.15.82 — fixed in 4.14.301, 4.19.268, 4.9.335, 5.10.158, 5.15.82, 5.4.226

How to fix

Upgrade to a fixed version: Linux kernel 4.14.301, 4.19.268, 4.9.335, 5.10.158. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4b351609af4fdbc23f79ab2b12748f4403ea9af4
• https://git.kernel.org/stable/c/53a62c5efe91665f7a41fad0f888a96f94dc59eb
• https://git.kernel.org/stable/c/7ca81a161e406834a1fdc405fc83a572bd14b8d9
• https://git.kernel.org/stable/c/7e177d32442b7ed08a9fa61b61724abc548cb248
• https://git.kernel.org/stable/c/8393ce5040803666bfa26a3a7bf41e44fab0ace9
• https://git.kernel.org/stable/c/b35d899854d5d5d58eb7d7e7c0f61afc60d3a9e9
• https://git.kernel.org/stable/c/dca370e575d9b6c983f5015e8dc035e23e219ee6
• https://git.kernel.org/stable/c/f3add2b8cf620966de3ebfa07679ca12d33ec26f

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